Why isn't my battery charging? M1 chip

Hi guys,

I recently bought a MacBook Pro 2020 m1 for a bargain price as it had a coffee spill on the keyboard. When I acquired it, it worked fine as did all the keys etc but they were crunchy when pressed and the backlight had faded in the middle, so I decided to change the keyboard (more info on that at the bottom).

When I put the MacBook back together, it turned on and the keyboard now works fine, but the battery won't charge. I have reseated the battery connection to the Logic Board many times and I have checked the connection of the Thunderbolt ports to the Logic Board, all seems well, it just will not charge. At one point I had an 'X' through the battery, but now I can get Coconut battery to read the battery data, it just won't charge.

I am using the charger that came with it, I have also tried a MacBook 12” Retina charger and swapped the cables, so it's not that. I am aware the 12” Retina charger couldn't even power a potato, but I tried anyway.

Any ideas? I'm stumped.

By the way - there isn't much information regarding the keyboard change on these, so I will say that the keyboard is rivoted on, as well as screwed on. So unless you have a microscopic rivot gun or you're very steady with some metal adhesive, don't bother. I applied tiny amounts of thick adhesive to the top of the rivots and was very careful not to let it run, worked a treat, but I only took that risk as the MacBook owes me very little money.

Thanks!

Andy.